| /** |
| * |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| #include "RocksDbStream.h" |
| #include <fstream> |
| #include <utility> |
| #include <vector> |
| #include <memory> |
| #include <string> |
| #include <Exception.h> |
| #include "io/validation.h" |
| namespace org { |
| namespace apache { |
| namespace nifi { |
| namespace minifi { |
| namespace io { |
| |
| RocksDbStream::RocksDbStream(std::string path, gsl::not_null<minifi::internal::RocksDatabase*> db, bool write_enable, rocksdb::WriteBatch* batch) |
| : BaseStream(), |
| path_(std::move(path)), |
| write_enable_(write_enable), |
| db_(db), |
| batch_(batch), |
| logger_(logging::LoggerFactory<RocksDbStream>::getLogger()) { |
| auto opendb = db_->open(); |
| exists_ = opendb && opendb->Get(rocksdb::ReadOptions(), path_, &value_).ok(); |
| offset_ = 0; |
| size_ = value_.size(); |
| } |
| |
| void RocksDbStream::close() { |
| } |
| |
| void RocksDbStream::seek(uint64_t offset) { |
| // noop |
| } |
| |
| int RocksDbStream::write(const uint8_t *value, int size) { |
| gsl_Expects(size >= 0); |
| if (!IsNullOrEmpty(value) && write_enable_) { |
| auto opendb = db_->open(); |
| if (!opendb) { |
| return -1; |
| } |
| rocksdb::Slice slice_value((const char *) value, size); |
| rocksdb::Status status; |
| size_ += size; |
| if (batch_ != nullptr) { |
| status = batch_->Merge(path_, slice_value); |
| } else { |
| rocksdb::WriteOptions opts; |
| opts.sync = true; |
| status = opendb->Merge(opts, path_, slice_value); |
| } |
| if (status.ok()) { |
| return size; |
| } else { |
| return -1; |
| } |
| } else { |
| return -1; |
| } |
| } |
| |
| int RocksDbStream::read(uint8_t *buf, int buflen) { |
| gsl_Expects(buflen >= 0); |
| if (!IsNullOrEmpty(buf) && exists_) { |
| size_t amtToRead = gsl::narrow<size_t>(buflen); |
| if (offset_ >= value_.size()) { |
| return 0; |
| } |
| if (amtToRead > value_.size() - offset_) { |
| amtToRead = value_.size() - offset_; |
| } |
| std::memcpy(buf, value_.data() + offset_, amtToRead); |
| offset_ += amtToRead; |
| return gsl::narrow<int>(amtToRead); |
| } else { |
| return -1; |
| } |
| } |
| |
| } /* namespace io */ |
| } /* namespace minifi */ |
| } /* namespace nifi */ |
| } /* namespace apache */ |
| } /* namespace org */ |
| |